Hybrid networks derived from isosorbide by means of thiol-ene photoaddition and sol–gel chemistry

Preparation and properties of hydrogels based on PEG and isosorbide building blocks with phosphate linkages

“…Fig. 3a shows the 1 H NMR spectrum of diallyl isosorbide which are in good agreement with that reported in the literature [22,23]. Because oligomerization or polymerization was avoided in this synthetic route, the resulting product of IDE appeared to be purer than the one prepared by the first method.…”

“…After the solution was dried with magnesium sulfate, EA was evaporated. The resulting diallyl isosorbide was a light yellow liquid [23] (yield ~90%). The chemical structure was analyzed by 1 H NMR (CDCl 3 , 300MHz).…”

Biodegradable hybrid poly(3-hydroxyalkanoate)s networks through silsesquioxane domains formed by efficient UV-curing

“…From this spectrum, one may deduce that hybrid network, PHA-N1, formed with an acidic catalysis are made up mainly of T 2 siloxane substructures, with a minor contribution of T 1 and T 3 sites. The predominance of T 2 species is in agreement with the theory of acid-catalyzed sol-gel [23,25]. The 29 Si CP/MAS NMR measurements also showed that UV curing favors condensation reactions and creates a higher cross-linked network, PHA-N3, than a conventional sol-gel process in solution.…”

Co-Networks Poly(hydroxyalkanoates)-Terpenes to Enhance Antibacterial Properties

“…The tensile strength decreases from 30 MPa (native PHBHV) to about 3-6 MPa. This trend is accompanied by an increase in the elongation at break from 7% (native PHBHV) to about 40% in the case of PHBHV-L networks, which is reflected in a better flexibility of the networks compare to native PHBHV polymers [51]. Furthermore, the increase of the weight fraction of PHBHV enhanced Young's modulus from 2.9 to 5.8.…”

“…The molar mass was calculated by the integration of the 1 H NMR signal at 5.25 ppm (3-3', OCHRCH 2 on the PHA backbone) against the signal at 3.55 ppm (B, OCH 2 CH 2 OH). Then, α,ω-diallylic PHBHV oligomers were obtained by condensation reaction [50,51] and characterized by 1 H NMR in CDCl 3 (Figure 2). The appearance of new signals at 5.8 ppm (H 3 , CH 2 =CHC) due to the allylic protons and 4.25 ppm (protons 6 and 7 of ethylene glycol terminal unit) confirmed the successful functionalization.…”